mm: use kcalloc() instead of kzalloc() to allocate array
authorThomas Meyer <thomas@m3y3r.de>
Tue, 29 May 2012 22:06:21 +0000 (15:06 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 29 May 2012 23:22:19 +0000 (16:22 -0700)
The advantage of kcalloc is, that will prevent integer overflows which
could result from the multiplication of number of elements and size and
it is also a bit nicer to read.

The semantic patch that makes this change is available in
https://lkml.org/lkml/2011/11/25/107

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/vmalloc.c

index 94dff88..c28b0b9 100644 (file)
@@ -2375,8 +2375,8 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
                return NULL;
        }
 
-       vms = kzalloc(sizeof(vms[0]) * nr_vms, GFP_KERNEL);
-       vas = kzalloc(sizeof(vas[0]) * nr_vms, GFP_KERNEL);
+       vms = kcalloc(nr_vms, sizeof(vms[0]), GFP_KERNEL);
+       vas = kcalloc(nr_vms, sizeof(vas[0]), GFP_KERNEL);
        if (!vas || !vms)
                goto err_free2;